Can-soldering machine



A. ALVAREZ.

CAN SOLDEBING MACHINE. APPLICATION FILED DEC.28, 1916- 1 396,01 1; Patented Nov. 8, 1921.

3 SHEETS-SHEET 1.

INVENTOR. 4 WITNESS.

Jif- ATioRNEY.

mmiw z, 5 mm A. ALVAREZ. CAN SOLDERING MACHINE.

APPLICATION FILED DEC.28.19I6.

1,396,011.- entedNov. 8,1921.

3 SHEETSSHEET 2.

I I Z4 25 23 I Z 20 I 1 7 IIIIIIIWIIII Z I v: 3 ll WITNESS. 2

@f 21 Si fly/M NO/Qua,

' ATTORNEY.

A. ALVAREZ.

CAN SOLDERING MACHINE. APPLICATION FILED DEC-28. 1916.

1,396,011. I Patented Nov. 8, 1921.

3 SHEETS-SHEET 3.

WITNESS. 44 a mam/: 4 am JfiTORNEY.

at Berkele UNITE-D, srATEsPATEN-T OFFICEQ ANTONIO ALVAR-EZ, 0F CALIFORNIA, ASSIGNOR T0 AMERICAN CAN COK- PANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF NEW JERSEY.

onn-sotnnnnve MACHINE.

To all whom it may concern.

a citizen of the United States, residing in the county of Alameda and State of alifornia, have invented certain new andruseful' Improvements in Can-Soldering Machines, of which the following is a' specification. f v

The present invention relates to a machine for soldering cans, and more. particularly for soldering, the eam between the end and the body ofthecan.

The object of the invention is to provide a machine of the: described type in whichthe solder is automatically fedinjthev proper amount: to complete the seam, and cut off upon the completion of said'seam. A. fur-, ther object is to provide. a machine'in which all the operations, with the: exception of feeding and discharging the cans, are automatically performed by mechanism simple in construction and efficient in operation.

The preferred form of the machine hereinafter described and herewith illustrated is adapted for soldering ends upon square or However, by means of simple changes in tion, the machine may be adapted to opera ate upon other types 'of cans, or upon-any other objects requiring a soldered .or fused seam of the same general 'type,.it being understood that the term .solder is used to signifyany fusible seamingmaterial capa- .ble of being appliedin the describedmanner. Inasmuch as such changes maybe made in the form andconstructionof 'the machine, without departing from the spirit of the invention, it is my :wish to beun- 'der'stood as claimingthe' invention, in. the

claims hereto appended, as broadly as the state of. the art willpermit. v

In order to comprehend the invention, reference should be had to the accompanying drawings, wherein.

v showing a can in position to be soldered. f

v the direction of thearrowson the lin e'3-3 f Fig. 1. a

Fig. 4 is a partly broken plan viewpenlarged, of the solder feed mechanism and Specification of Let'ters-Patent- V Fig. 3 of the ed the details of. construe,

Figure 1 isa plan view of the machine,

Patented Nov, 8, 1921.

Application filed December 28,1916. Serial No. 139,340.

the seaming irons, the' former being shown in its initial position, that is, atthe beginning of a seaming operation.

Fig. 5 is a vertical sectional view, taken in the direction of the arrows on the line j5-5 of Fig. 4.

Fig. 6. is a view similar to that disclosed by Fig. 4 of the drawings, showing the feed mechanism in a slightly advanced position. c

Fig; 7 is a similarview of a portion of the feed mechanism, showing-the same in its final position, that is; at the end of the seaming operation.

Fig. 8 is a vertical section of the solder feed mechanism, taken in: the direction. of thefarrows on the line 188" ofFig. 6.

In the drawings, the reference numeral 1 designates a upon whichis mounted a horizontal table or bed plate 2.

A vertically disposed shaft 3, drawings, is suitably journaled at i in a bracket carried by the bed plate 2. Said shaft carries upon'its lower end a bevel gear 5-Fig 2 of the drawings, adaptgear 6 carried upon a horizontally disposed drive'shaft'fithe latterbeing provided with mean for receiving power" source, not shown in the drawings, as, for example, a pulley 8. V The vertical shaft 3 carrie'supon its upper end, above thebed'plate 2, a can holding chuck*9, -Figs. 2 and 3 ofthe drawings,-said chuck being properly formed to engage and hold the end or bottom 10 of'the can 11 and to support the" same thereby. The: vertical shaft 3 also carries a horizontally disposed cam 12-Figs. 2, 3 and 5 of [the drawings, immediately below the chuck 9. The camLl2 in shape conforms to the outline of the bottom of the can 11 and is therefore similar in contour to the seam 10 to be soldered, said seam being in the present case at the joint between the canend 10 and the can body 11. .:The cam 12, as herewith illustrated, is substantially the same in size asthe can 11.

' Mounted upon the bedfplate 2 at one side of the machine are a pair of angularly dis.- posedbracketsl3 and 13- Fi'g. 1 of the drawings. Within said brackets and held from an outside suitably constructed base,

to mesh with and be driven by a similar thereby for horizontal sliding movement,

are slides 14 and 14 respectively, one of of which is illustrated at 17 in Fig. 3 of l the drawings, said faces being adapted to said slides being shown in Fig. 3 of the drawings.

, e the "latter being pivotally connected with said slides at 16 ad 16' respectively, and each having a cam following face, one

engage and follow the cam 12. Said burner heads are also provided with burners 18 and 18, one being illustrated in Fig; 3 of the drawings, adapted to'direct flame jets upon the seamlO to be soldered. Gaseous fuel is supplied-to the burnersby means of flexibletubes 19 and 19', and the hollow pivotal con- ,nections 16 and 16 between said burner i burner heads in contact with the cam 12.

'It' will readily be seen that on account :ofthe pivotal mounting of the burnerheads heads and their respective slides. Springs 20 and 20'. are provided for holding the 15 and 15 and the sliding movement of their carrier members 14. and 14, said burner heads will follow the contour of the seam 10 andwill heat the same with the least i Q to and extending" laterally from the upper portion of the-base 1'. Uponsaid bracket, at

possible waste of fuel. e r '9 @n the opposite side of the machine is mounted a bracket 21, the same being fixed one; side thereof, is carried a suitably formed guide member.-22- Fig. 1 of the drawings,

vin which is slidably mounted a slide bar 23 carrying upon its lnner end an ironing plate V 24, the same being pivotally connected at 25- vwith said slide bar 23, as shown in Figsjl an d3'of the drawings. The slide bar '23 has mounted. thereupon ajburner 26-' F igs. 1, 3' and f the drawings, said burner being adapted to direct a jet of flame against the rear surface of the ironing'plate 24. The burner '26 .is connected with a'flexible gas supply tube 27,-as shown in Figs; 1 and 3 of the drawings.

A similar slide bar 23f,lags. 1,2 and 4 of pine "drawings, is carried within suitably acting t draw theslidebars 23 and 23 inwar'dly. The ironing plates24 and 24, be

formed guides 22 mounted upon the bracket 21- 11 the opposite side thereof from the and {adapted to direct a jet of flame against the rear surface of-the ironing plate 24'.

The ironing plates 24 and 24: are adapted to bear against the seam 10 of the canand are held in thisrelation by springs 28. and 28 Figs. 2 and 3 of the drawings,rsaicll springs ing heated'by their respective burners 26. and

r i 2671m the seamas'the fusible solder is applie d'thereto. The bracket 21 carries, be-

Said slides 14 and 14, carry upon their inner ends burner heads 15 and tween the ironing slides previously described, 7

a' sliding member 29Figs. 1, 4 a'nd5of the drawings, said sliding member being suitably mounted in said bracket 21and adapted for sliding movement therein in'a'direction radial with respect torthe' chuck'9r The inner end of said sliding member 29' carries a cam' following roller 30'--Figs. 1* and 5,

adapted to follow the'cam 12, and a spring '31-Figs. 2 and 5, holds said cam follower 30 in contact withsaid cam 12 so that the slide 29 vis given a reciprocating motion by the rotationof said cam. Carried uponthe slide 29 are, tubular guide members 32-Figs;

4 and 5, through whlch is passed, in the form of a wire 33, the fusible metal, said guides 32 being so positionedfthat'the end 34 of the fusible solder wire bears against the seam 10-of the can: Said solder wire33 is preferably carried upon a suitable reel or spool 35 mounted-upon brackets 36 carried by the slide 29.

Figs. 1, 4 and 7 of-the drawings, are suitably mounted upon vertically clisposed bear- ,ing, pinsl38 and 38, respectively, carried by A pair of solder feed rolls37 and 37- 1 the slide 29, said feed rolls lying-upon either side of the solder wire-33 andadaptedto clamp the same between them. The feed roll37 has fi'Xed-to-ita ratchet wheel 39,

1 and-5 ofthe drawings, which lies in a horizontal position above said feed rolls and the solder wire. A pawl40, pivotally mounted at '41 upon the fixed guidemember 22', is adapted to engage the teeth of said ratchet wheel 39 andis held in such engagement by a spring 42; A similaripawl 40", shown in V Fig, 8, andin dotted lines in Figs. 4, 6 and 7 of thedrawings, is pivotally'mounted at 41 upon'the'fbracket 21 and 'isheld in'en- .gagement with-the teeth of the ratchet wheel 39, at ,a point substantiallyopposite to the pawl 40, by a spring 42,Fig. 40f the drawings, Thus itwill be seen that asthe slide V and out, saidratchetwheeliis caused. to m tate intermittently by the pawls 40 and 40',

29 carrying the ratchet wheel 39 moves in thereby rotating the feed roll 37.1 A pair ofv coacting spur gears 43 and 43,, mounted respectively: upon the 'feec'l'rolls-oTZ and 37, im-

part rotation from the feedrolli37 togthe' feed roll37-.r The feed roll 37 {is not carried directly by'the slide 29. Thebearingpin 38' of said feedgroll is fixed-upon a horizontally" disposed angle -plate-44,Figs. 4, 6, 7 and 8 of the drawings, said angleplatebeing pivotallyconnected with-the slide 29 at,45 and'reciprocatingtherewith; The outer arm 44 46 which engagesan eccentric slot47 formed in the outer end of a horizontal plate'i48 whoseinner endis pivotally carried by. the bearing pin 38 of the feed roll 37j Thepin reciprocates the plate48, its movement being longer than said slot. The slot 47 in said "of said angle plate carries-anupstanding pin plate 48 is so formed that when said plate 48 is moved forwardly, that is from the position shown in Fig. 4 to that shown in Fig. 7 the angle plate 44 is drawn outwardly by means of its pin 46 and thereby moves the feed roll 37 out-of engagement with the solder wire 83, as shown in Fig. 7.

A fixed horizontal plate 49 is carriedupon spring 57 against a stop 58, andthereby held in a position to engage onevof the teeth 53 of the dog 51. at .each outward stroke of .said slide 29, and by such engagement to move said dog to bring the next tooth 53 thereof into position for engagement with said pawl 55 upon the next outward stroke of the slide 29. Thus at each outward movement of said slid'e,'the dog 51 is moved by an amount corresponding to oneratchet tooth 53, until it finally reaches the position shown in Fig. 7

of the drawings, with the lug 54 in the path. of a pin 59 fixed onthe arm 48, thus holding said arm from swinging outward and thereby, holding the feed roll 37 out: of engagement with the solder wire33, and stopping the feed of said solder. urther reciprocation of the slide 29 has no effect, therefore, upon the solder wire. 7

It will be seen from the drawings that there-are five ratchet teeth53 upon the feed control dog 51, this being the proper number for a machine adaptedlfor four sided cans. The solder 1S allowed to feed.

plete strokes ofthe slide 29, that is, for one and one-quarter revolutions of the can chuck 9. The seam-is thus solderedon all sides of the can, with. sufficient overlap to insure its completion underallconditions.

A kicker. arm 60 is provided, said. kicker being pivotally mounted, at 61-, upon the fixedtplate-49 in proximity. to. the dog 5l,

and having one of engage and bear against; a .cam surface "63 on the dog 51, to give'saiddog a final rapid movement, during the lastoutward stroke of the slide 29, tdinsure the engagement of the lug 54 with the .pinr59, and to holdsaid dog in its final position. A spring 64* is provided to actuate said kicker arm.

'ium

solder feedmechanism is adapted to be reset by hand, and for this purpose the dog 51 is formed with anextension 65, by means of which it may be moved back to. its

' initial position. The slotted plate 48 is then 're-Set to its initial egthe gr rp ns of he. nlder W e. 33; e-

position, 7 thereby permit for five come to be soldered, means for its ends'lfiZ adapted to 7 cording to the tween the feed rolls'37 and 37", for the feeding thereof for another one and one-quarter revolutions of the can chuck.

The can 11 may be placed upon the chuck 12 and removed therefrom by hand, or by any suitable placing means not shown in the drawings; and similarly, the rotation of said chuck may be controlled in any manner or by any means not shown. However, when the can has been placed upon the chuck, and the rotation thereof begun, the seam 10 will be automatically soldered, the solder being fed for the proper time to completely solder said seam, and cut off at the end of such time, to prevent waste.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is '1. In a can soldering machine, meansfor receiving and holdinga can having a seam to be soldered, means for fusing solder upon said seam, devices for automatically feeding a definite predetermined amount of solder thereto, and means correspondingwith the shape of the can for actuating said feeding devices.

2.1 .11 a can soldering mach1ne,means for rocating devices according to the peripheral shape of the can. I y

3; In a can soldering machine, means for receiving and holding a canihaving a seam to be soldered, means for fusing solder upon said seam, devices. for feeding solder thereto, and a cam corresponding with the shape of the feeding devices.

4. In acan soldering machine, means for 7 receiving and holding a can having a seam fusing solder upon said seam, devices for feeding solder step by-step thereto, and mechanismfor throwcan for automatically.controlling said i'ng said feeding devices out of operation upon the completion of a predetermined number of said steps and of the seam.

5. In acan soldering machine, means for receiving and holding a can having a seam to be soldered, means for fusing solder upon said seam, rotary devices forfee'ding solder thereto, reciprocating means operating acperipheral shape of the can for actuating said rotary devices, and mechanism for automatically 7 the solderl r 6. In a can soldering-machine for thesoldering of endseams of cans having an angular'peripheral contour, the combination of 7 means for holding and rotating such a-can dy, a upp rt movab ardnncl rem throwing said ro-f 'tary devices out of operative relation with i so " feeding means disengaged after a certain 1 number of operations of said support and 1rrespect ve ot'itsfurther OPGILtlOIL] the axis of the canbody, means for main-.

taining said support at a varying distance from said axis, solder-feeding means carried on said support, and means for disengaging said feeding means from the solder.

, 7. In a can soldering machine for the soldering of end seams of cans'having an an gular peripheral contour, the combination of means for holding and rotating such a can body, a support movable toward and from the axis of the can body means for main taining said support at a varying distance "from said axis, solder-feeding means carried on said support, andmeans fordisengaging saild feeding means from the solder at each outward movement of said support, and

means for maintaining said disengagement "body, a support movable toward and from the axis of the can body, means for maintaming said support at a varying distance from said axis, solder-feeding means carried on said support, means for disengaging said feeding means from the solder, and means.

operated by said support for holding said 9.' In a'can'soldering machine for the solderlngoi end seams of cans havlng an angu 'lar peripheral contour, the combination of 7 means for holding and rotating such a can V tatcd, andmeans whereby said heating heads body, and a-' plurality of heating heads adapted to engage at each sideofeach angle of the can body In turn as said body 18 roarecaused to move towardand from the axis of the can body to maintain said heads inf'contact with the can body. I

10'. In aca'n soldering machine for the soldering of end'seams of cans having an angular peripheralcontour, the combination-of meansfor holding and rotating such a can body, a fiat sided oscillatory'heating' head adapted to engage at each side of each angle ofthe can body in turn as saidbody isrols'a m'e 'outoffeedingrelation with said Solder j tated, and means whereby said heating head is caused to move toward and from theaxls or the can body to maintain the hat side of said head in contact with the periphery of the can body}; v e x i 1 11. In a can soldering machinefor the soldering of end seams ofcanshavingan angu lar'peripheral contour, the combination of means for holding and rotating such a" can body, a plurality of pivoted oscillatoryheatingheads'adapted to engage at each side'of Q each an'gle' o'f, the can bociyrinturn as said body is rotated, and means whereby "said heating heads are caused to move towardtain said heads in contact with thecan body.

12. In a can soldering machine for the sol- 'dering of end seams of cans having an angular peripheral'contour, the combination of means for holdingand' rotating such a can body, a plurality oi oscillatory heating heads adapted to engage at each side of each angle of the can body in turn assaid, body is rotated, and means comprising slides'and springs v whereby said heating heads are caused to move toward and from the axis of the can body to maintain said heads in "con.- tact with the lattera r 13. In a can soldering machine for the solderingof end seamsof cans having an angular peripheral contour, the combination of means for-holding and rotating such a can body, a plurality of oscillatory heating heads adapted to engage at each side of each angle of the can body in turn as said body is rotated," and means'comprising slides and slide-controlling springs and cam whereby said heating heads 7 are caused to move toward and from the axis of the can body to maintain said head'sincontact with the can body. a

it. dering of end'seams of cans having an angular peripheral contour, the combination of means for holding and rotating "such a can body, a: pluralityof heating heads adapted to'engage at each side'ofeach angle of the canfbody in turn "as'said body is rotated, means whereby saidheatmg headsare caused to move toward and from the axis of the can body to maintainsaid heads in contact with the can body,asupport movable toward and In a can soldering machine for the soliromfthc axis of thecan body, meansfformaintaining said support at a varying distance from said ;ax1s, solder-teed1ng means carried on said'sup'port, and means for disengaging said feeding means from the solder.

.15. Ina can; solderingmachine, a rotatahie-chuck for holding a can having a seam to be soldered, means for fusing solder upon said seam, reciprocating devices actuated-by the rotation of said chuck for feeding solder to said seam, and m'echanismwctuated by said-reciprocating devioesjfoi throwing the upon thecompletion o'fsaid seam.

l6. A'can soldering machine comprising soldered, a movable radially disposed mem-e 7 her adapted to be reciproc'ated by the rotation of saidchuckto follow the seam of the can,.devices carriedby said reciprocating member for feeding solder to said seam, and*' mechanism actuated by thereciprocation of; V

of said feeding devices said member for controlling the operation rotatable chucka'dapted to receive and hold a polygonal can having a seam to be sol-.

, dered, amovableradially disposed member adapted to be reciprocated by the rotation of said chuck tefollow the. seam of the can,

means carried by said. reciprocating member for supporting a str1p-ofsolder with its endin fusing relation'iwith said seam, devices'actuated by the reciprocation of said member for feeding said'strip, and mechanism for automatically throwingsaid feeding devicesr out of operation upon the completion of the from said axis, solders-feeding means carried on said support, means for, disengaging said feeding: means from the solder, and fusing headsonwhich the can body has. a sliding action at each sideof the point of delivery:

' of the solder.

L19.- In a can soldering machine for open, atlng ona-ngular cans, means for recelving' and-holding .a can having a seam to be soldered, mechanism for feedingsolder to said seam andfusin-g the: same thereupon, and a 'pivotally mounted flat sided heating device adaptedtoturn the corners of the can and follow the contour of said seam with said fiat'side for the heating thereof, said means for holding the can and said heating device being relatively {reciprocabletoward and from: each othe j r 5 '20. In a cansol'dering machine for operating on angular cans, means for receiving and holdinga canhav-in'ga seam tobe soldered, mechanism for feeding solder to said seam and fusing the same thereupon, a. ivotally and a slidably mounted oscillatory atfaced heating device adapted to turn from one side of the can to another sidev around the corners thereof and to be parallel with either side and follow the contour of said 7 seam'for the heating thereof, and means for actuating the slidable mountingof the heating device toward and, from the axis of the can at the flat sides and corners of the can respectively. i

21. In a can soldering machine for operating on angular cans, means for receiving and holding a can having a seam to be soldered, mechanism for feeding solder to said seam, and pivotally mounted oscillatory fiatfaced devices adapted to turn from one side ofthe can to another side around the corners thereof and to be parallel with either side and follow the contour of said seam around the corners of the can for heating the same rotatable chuck adapted to receive and-hold a polygonal:canhavinga seam to besol dered, means for feeding solder to said seam,- a radially movable member adapted to be reciprocated. by the rotation of said chuck to maintain a constant spaced relation between, said member andthe seam, and head pivotally carried by said member and adapted to turn from one side of the can to another side around the corners thereof and to be parallel with either side and follow the conton-"rof said seam for heating thesame and fusing the solder thereon.

Q23; :A can soldering machine comprising a.

rotatable chuck adapted to receive'and hold a polygonal can having a seam to be soldered, means for feeding iolder to said seam, a plurality of radially movable members adapted to be reciprocated' by the rotation of said chuck to maintain. a constant spaced relationgbetween saiid members and the seam, burner heads pivotally carriedby certain of said members and adapted to followthe c011 tour of'said seam forheating-the same, fusing heads pivotally' carried by the other 'members and adapted to follow the contour of said seam forffusing the solder thereon,.

means for supplying fuel to said "burner: i

heads,

.andmeans for heating said fusing heads.

24a In a soldering machine for the soldering of end seams of cans having an angular peripheral contour, the combinatlon of solder feeding devices, and means for causing said devices to be moved toward the can as a smaller radius of the same is presented'und away from the can as a greater radius thereof is presented, whereby the solder is: caused to approachtlie can surface during'the first of said movements and. the

can surface is caused to approachthesolder during thesecond ofs'aid movements.

25. In a can-soldering machine for the soldering of 'end seams of cans. having an angular peripheral contour, the combination of solder feeding device's, and means for causing said devices to be moved toward the can as a smaller radius ofthe same is 'pre-. sented and away from the can as a greater redius thereof is presented, whereby the solder is caused to approach the can {surface during the first of said movements and the can surface is caused to approach the solder during the second of said movements, and automatic means for intermitting the feed of solder. p I

' 26. In a can soldering machine for the soldering of end seams of cans having an angular peripheral contour, the combination of solder feeding devices, and means for causing said devices to be moved toward the can as a smaller radiusof the same is presented and away from the can asagreater radius thereof is presented, whereby the solder is @PSQ t9 approach the can'surface 7, vancing elements, means for separating said :elements to release the solder and means for moving said elements toward and from p solderingoffend seams of. cans having an angular peripheral contour, the COIIllOlIlEttlOIl of means for holdlng such can, devices for variably feeding solder to thegsurface of I 1 'thefcani,

soldering of end seams of "cans having an angular peripheral contour, the combination the same,and means for causing a-relative rotation between thesaid holding means and said feeding devices, said feeding devices comprising rotary solder-gripping andad- 28.'In a can soldering machine for the I of can-rotating means, s olderegripping and advancing rolls,;and means for movingsaid rolls toward and from the can.

29.;In a can soldering machine soldering of end seamscofcans-having an angular peripheral.contour,xthe combination "of. a rotatable can holder, solder4feeding means, and means for causing the advance ofsolder to' be intermitted as'the can sur-' faces of greater distance from the axis of, rotation are presentedto the solder.

. e 30. In a cansoldering machine for the soldering of end seams of cans having an angular peripheral contour, the combination ofxa rotatable canfholder, solder feeding means acting to feed the solder in a substantiallyradial direction toward the axis ofthe can, and means for causing the advance of solder. to be -1nterm1tted as the'can surfaces of greater-idistanceifrom the axis of rotation are presented tothesolden- 31, In a can soldering machine adapted for operation on angular can rbodies,r "the V comb nation of means for: receiving and holding a can body havlng "a seam to be for the soldered, me' ansfor supplying solder t o such andoscillatory heating head arranged at onej side of a line from the center of said seam to be melted thereon,la rec.iprocating' c n y," and" a second reciprocating and Y oscillatory heating head arranged at the can bodysuccessively asth'e latter isrotated',

other side of said line, said heating 'jheads' being adapted to embrace thecorners of the 32. In a can soldering-"machinethe come bination of; means for holding a flat-sided can, a longitudinallyextended-heater hav} 111;; means whereby 1t may move toward or from the canand turn- "at difierent angles? into parallelism with suceessive faces'fof the can, meansfor moving the lieater'qnearer to" and farther from the' 'centerof thecanjand the can} and the heater.'

33 In a can'solder'ng machine, a rotatable chuck for holding a can havinga plu rality ofsi'des-and a seam'to be soldered, r 1 f;

mechanism for feeding solder to saidseam, and p voted movable heating devlces'having the can to another side -'around-the corners thereof and to havesaid elongated sides solder thereon 1- angular peripheralcontour, the combination of can rotatlng means, solder-grlpplng and advancing devicesymeans for moving said devices toward and from the can repeatedly during onerevolution of the "can, and means for causing said devices to iintermit their solder-advancing action. Q

In testimony: whereof name to this specification in a subscribingwitness}1.: v- V N. '1 Adams.

means for causing relative rotation between 34. In aican soldering machineffor the soldering ofl-endseams oficanshaving an I have my the presenceof "9o inner elongated sides actuatedby therota? tion of said chuck to turn from one side of V Y parallel with either side and-follow the contourof said seam around the cornerslof the can for heating the same and fusing the 

